US1515301A - Mechanism for embroidery stitching - Google Patents

Description

Nav.

J. FINK MEQHANISM FOR EMBROIDERY STI'TCHING FiledMarCh 30, 1920 2 Sheets-Sheet 1 l i gli@ 'fr Nov.` l l, 1924.

J. FINK MECHANISM FOR EMBROIDERY STITCHING 2 Sheets-Sheet 2 Filed March 30 l Patented Nov. ll, i924.

JOHN FINE, or New YORK, n. Y.

MEOHANISM FOR EMBROIDERY STlTCI-IING.

Application led March 30, 1920. Serial No. 369,832.

To 'all 'wh-0m it may concer/a:

Be it known that I, JOHN FINK, a citizen of the United States, residing in the city, county, and State of New York, have in` vented certain new and useful Improvements in Mechanism for Embroidery Stitching, of which the following is a specification.

My invention relates to novel mechanism for making a double embroidery stitching of the type shown and described in my United States Letters Patent, No. 1,095,199, dated May 5, 1914, and such mechanism is an improvement upon the mechanism described in such patent. j

My Apresent invention relates more particularly to a `needle holder and a looper .construction by means of which l avoid the necessity of employing different nipples in order to obtain stitches of varying widths, and avoid also the necessity of making a manual adjustment of the looper.

My invention may be embodied in mechanism of various constructions. One mechanism embody-ing my invention is shown in the accompanying drawings in which Fig. 1 represents an elevation partly in section of my needle holder, work table and looper mechanism; Fig. 2 represents a substantially central vertical section of my needle holder along the line 2-2 of Fig. 8; Fig. 3 represents a central vertical section of my needle holder along the line 3 3 of Fig. 2; Fig. 4 shows a bottom view of my improved needle holder; Fig. 5 shows a rear view oi' my improved needle holder; Fig. 6 shows a plan view, partially in section, of the mechanism by means-of which the looper is given a high speedof rotation for a certain portion .of its travel and a relatively low speed ot rotation Jfor the remainder of its travel; Fig. 7 is a front view of .a portion of the mechanism shown in Fig. 6; Fig. 8 is a plan view of .one of my loopers, the two needles being shown yin section to indicate their position relative to the looper just after the looper has picked up the thread; Figs. 9, 1Q and 11 represent -loopers of different sizes, Fig. 9 representing the same looper which is represented in Fig. 8.

In the drawing 1 represents a needle provided with a'hook 2 at its end, while 3 represents an eye-pointed needle provided with the usual elongated hole 4 near its end for the insertion or' a thread. These two needles are arranged and held-side by side, the needle 1 being fixed to any suitable holding member adapted to be reciprocated up and down in the needle head, while the needle' is held in a needle holder -5 hereinafter vtobe described. vThe lower end of the needlel passes through the hole 7 in the Vnipple or guide 6, while the eye-pointed needle .3l lies in a lateral slot 8 provided in the nipple or guide 6. At the top of a -rotatable spindle 9, held in the frame of the machine below the bed 10 thereof,and in alignment with member 5 is a looper 11.; this looper and the means for securing it in position will lh'ereinat-er be described in detail. l

At the inside of theeye-pointed needle just above the hole 4 is preferably formed abdepression 21, the looper and the eye-pointed needle being so arranged that, when said needle lis at the proper' height, the looper, 4if rotated, will cause the `hook thereof 'to enter the depression 21 as it passes the needle.

The spindle 9 to which the looper 11 is attached is rotated by lmeans of worm .22 at the bottom of the spindle and worm y20 attached to a reciprocating shaft 24. fIn Order that a -portion'of the rota-tion of the looper may take placeat a high speed and vanother portion at a relatively :low speed, :the lshaft 24 is caused 4to reciprocate by any suitable quick-return mechanical movement. In the construction illustrated in Figs. 6 and 7 this mechanical 'movement consists oli aa. crank disc 31 carrying crank pin 32 to which is connected link 33, crank Ypin 34,'.crank 35, crank 36 and pitman 437, all properly supported `in a 'bracket 8S provided with fbearing ylugs 39. If desired the connection .between pitman 37 and crank 36 may be made adjustable so as to regulate the amount of throw of the looper. A

The operation of the mechanism is substantially like that of the mechanism shown in my Letters Patent hereinabove referred to and need therefore not be described herein. V The needle holder 5 consists ot' a needl guidinghead' 51 provided with one or more needle guide passages 52, 53, a needle holding member 54 provided with afneedle socket 55 and a clampserew 56 ytor clamping the eye-pointed needle 3 in `the needle socket. The needle holding member 54 is adjustably carried in the head 51. Any suitable means may be` employed for attaching such member adjustably to the head 51. ln the construction shown such member is provided with a dove-tailed split extension or shank 54C provided with expanding screw 57, such shank being arranged to slide in a suitably arranged dove-tailed way 58 in the head 51. An adjusting screw 59 provided with collar 60 and head 61 passes through head 51 and threadedly engages member 54e to adjust the latter into desired position after the expanding screw 57 has been loosened, such screw being,` of course, again tightened after the member 54 has been brought to the desired position. retaining plate 62 is held in place by screw 63 and engages screw 59 between collar 60 and head 61.

By means of the member 54 the position ot the eye-pointed needle 3 relative to the hooked needle 2 may be readily adjusted, thus avoiding the necessity for manipulating the nipples or guides 6 in any manner when it is desired to make embroidery stitches of dierent widths, it being oi" course understood that the lateral slot 8 in the nipple or guide is made sufficiently deep to permit an adjustment of the sewing needle to different positions. .By providing a plurality of holes 52, 53 in the head 51 to permit a change in the position or location of the needle 1 with respect to the needle 3, a still wider range o't' adjustment between the hooked needle 1 and the eye-pointed needle 3 is made possible.

It is, of course, obvious that as the looper hook always has to be at substantially the same distance :trom the eye-pointed needle, it will be necessary to provide for each position of the eye-pointed needle, a looper hook in a corresponding position. ln the mechanism shown in my Letters Patent hereinabove referred to l have made the looper adjustable. ln the mechanism in which l have embodied my present invention l have provided a series of interchangeable loopers of various sizes in which the hooks are located at different positions from the axis of the looper. l/Vhen the eye-pointed needle is in a given position l select a looper of suitable diameter so as to preserve the necessary relation between looper hook and needle.

I have shown a series of such loopers in Figs. 8, 9, 10 and 11 of the drawings. Each looper consists of a base member 12 and an upwardly extending member 17 which .is hollow and cylindrical and terminates in a hook 18, the bore Vof said member 17 being of unbroken continuity. Each looper is provided with a threaded opening 14 adapted to receive the screw-threaded end of a rod 15 passing through the center of spindle 9, such rod being provided at its lower end with a knurled head 16. As a convenient means for holding the looper against rotation relative to the spindle 9, each looper naiaeo base 12 may be provided with a pin hole 13 adapted to receive a key-pin 113 extending from the upper surface of the spindle 9. For the itormation of narrower' embroidery stitches the hooked needle 1 is positioned in needle guide passage 53. lf it is desired to make stitches wider than those which can be made with the hooked needle in this position, and the eye-pointed needle in its outermost position, 'the hooked needle is positioned in guide passage 52; the larger sizes ot looper permit the making of this adjustment because openings of suiiicient sise are provided in their upright members 17, as can clearly be seen by comparing Fig. 11 with Fig. 9. Of course, when the position of hooked needle 1 is changed from guide passage to guide passage 52 it will be necessary to make suitable provision in the nipple or guide 6 for permitting the passage ol said needle therethrough. rlhis can readily be done, in any convenient manner as, for instance by providing additional elements, or by slightly adjusting certain of the elements o1" the illustrated arrangement, the slot 8 being made of suflicient width to permit the needle 3 to clear the walls thereof in any event.

When the larger sizes ot looper are used it may be found, under certain conditions, that too large a thread loop is pulled out by the rotating looper or that the looper thread binds against. the upright member 17. ln order to avoid such a condition it may, under such circumstances, be advisable to reduce the circumference of the thread engaged portion of the upright member 17, as ior example by providing said member at an intermediate point with a slot as indicated at in Fig. 11.

By making my looper in the form of a cylindrical upright member or barrel with a hook attached to the upper edge thereol in any event l obtain certain advantages, one ot which is that the hook of needle 1 cannot pick up the lower portion of the loop.

It is, of course, obvious that many changes may be made in the details of the construction particularly described and illustrated, without departing from my invention and without changing the function performed by such construction. For instance, the hooked needle 1 may be operatively combined with the head 51 otherwise than as shown, the term positioned in such head being used in a broad sense to include such variations within the meaning ol' the language of the claims; the relative positions of eye-pointed needle and hooked needle obviously may also be reversed, in which case the former would be positioned in head 51 and the latter positioned in member 54; furthermore, the needle carried by the member 54C may occupy different lll) positions relatively to such member from the one illustrated without in any way departing from the inventive idea.

It is, of course, also obvious that for Certain Widths of stitching the hooked needle may be adjusted within the limits permitted by the inner diameter of the barrel of the looper in preference to having the adjustment made by shifting the eye-pointed needle.

l claim:

l. A looper having a hollow, cylindrical shank and. a hook at the upper edge thereof, said cylindrical shank beingprovided with a thread-receiving surface depression located between and entirely within the terminals of said cylindrical shank, substantially as and for the purpose described.

2. In an embroidery machine, the combination of a hooked needle and an eyepointed needle held side by side and adapted to be reciprocated vertically to form a thread loop, and a looper arranged to rotate upon a vertical axis, said looper comprising a hollow, cylindrical shank having an axial bore of unbroken continuity throughout the length of said shank and a hook at the upper edge thereof, said hook beingl arranged to engage the thread loop, draw out said loop and finally to engage the loop with the hook of the hook needle,

parallel eye-pointed and hooked needles, y

the hooked needle being laterally adjustable, and a looper having a cylindricalbody portion in which the hooked needle projects in portion, the cylindrical body portion of the looper being constructed with suiicient interior space to permit such` lateral adjustment. f 1

n an embroidery machine of that type which includes a universal feed mechanism actuated manually by means of a crank handle and including a needle bar and hoo-k needle, the combination of a rotary screw spindle having interchangeable looper tops oscillating about the hook needle in axial -alignment with said needle bar and hook needle, and means for imparting a varying rotary motion to said screw spindle.

5. In an embroidery machine, the combination of a. rotary looper, a hook needle, a needle clamp whereby said hook needle may be set in or out of axial alignment with said loo-per, an eye needle, and an adjustable clamp for said eye needle.

ln witness whereof l have hereuntoset my hand.

JOHN FINK.

Images